CN217360371U

CN217360371U - Light guide plate

Info

Publication number: CN217360371U
Application number: CN202221093153.1U
Authority: CN
Inventors: 金鹏
Original assignee: Changshu Guangyang Electronics Co ltd
Current assignee: Changshu Guangyang Electronics Co ltd
Priority date: 2022-05-09
Filing date: 2022-05-09
Publication date: 2022-09-02
Anticipated expiration: 2032-05-09

Abstract

The utility model relates to a light guide plate, in particular to the technical field of light guide plates, which comprises a light-transmitting base body, the light-transmitting substrate comprises a light-in side and a light-out side arranged opposite to the light-in side, the light-in side is provided with an LED lamp, the light incident side and the light emergent side are parallel to each other, a plurality of convex triangular pyramid prism units are arranged on the surface of the light emergent side, the triangular prism unit comprises triangular prism microstructures and a plane area nearby the triangular prism microstructures, each triangular prism structure is a tetrahedral structure formed by cutting any one corner of a cube and a chamfer plane, the tetrahedron structure is by three congruent right angle isosceles triangle and an equilateral triangle respectively, the one side at the equilateral triangle place of triangle awl prism micro-structure is located the same side with the light-emitting side of printing opacity base member, the utility model discloses the technological effect that has improved light energy utilization rate.

Description

Light guide plate

Technical Field

The utility model belongs to the technical field of the technique of light guide plate and specifically relates to a light guide plate.

Background

Nowadays, liquid crystal displays are widely used in various electronic devices requiring display. The liquid crystal display comprises a liquid crystal display panel and a backlight module. Since the lcd panel does not emit light, the backlight module is needed to provide a backlight source to the lcd panel for displaying images. Therefore, the quality of the backlight source provided by the backlight module also affects the image quality.

The types of backlight modules include direct type backlight modules and side type backlight modules, wherein the side type backlight modules are widely used in thin electronic devices because of their advantage of thin thickness. The side-in type backlight module comprises a light source and a light guide plate, wherein the light guide plate is used for guiding light rays emitted by a point light source or a linear light source arranged on the light incident surface of the light guide plate to the light emergent surface of the light guide plate so as to form a surface light source.

Along with the energy-saving trend of products, the energy efficiency utilization requirement of the light guide plate is higher and higher, and more designs can attach a reflector plate to the light-emitting side of the light guide plate, including common white reflection and even silver reflection with higher cost. However, the requirement of thinning and narrow frame leads to more obvious bright lines derived from attaching the reflective sheet on the light-emitting side, which makes the display taste and visual effect hard to endure, and the attaching of the reflective sheet leads to increase of the man-hour and labor cost of the assembly process.

Therefore, patent 201721004532.8 proposes to provide a strip prism on the light exit surface to reflect the light back to the light guide plate when the light enters the light exit surface, thereby improving the utilization rate of the light.

Patent 201721004532.8 only plays the recovery function to the light that the less angle incides the exit surface, if the light angle is great, the incident angle still will be less than the total reflection angle and transmit out the light guide plate, as shown in fig. 1, satisfies the total reflection condition when some light 1 incides the strip prism, can return the light guide plate and recycle again, does not satisfy the total reflection condition when some light 2 incides the strip prism, transmits out the light guide plate, causes the light energy loss, therefore the light energy recovery efficiency is not high.

Disclosure of Invention

The utility model aims at providing a light guide plate, it has improved the efficiency of light energy utilization, effect.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

the utility model provides a nuclear resonance diffusion image device, includes a printing opacity base member, the printing opacity base member including go into the light side and with go into the light side relative light-emitting side that sets up, it is provided with the LED lamp to go into the light side, it is parallel to each other with the light-emitting side to go into the light side, the light-emitting side surface is provided with a plurality of bellied three pyramid prism units, three pyramid prism units include three pyramid prism microstructures and its near plane region, every the tetrahedron structure that an arbitrary angle and a scarf that the triangle prism structure is a cube cut off, the tetrahedron structure is respectively by three congruent right angle isosceles triangle and an equilateral triangle, the one side at the equilateral triangle place of three pyramid prism microstructures is located same face with the light-emitting side of printing opacity base member.

Preferably, the plane area around each triangular pyramid prism microstructure is hexagonal, and one of the intersection points of the three sides of each triangular pyramid prism microstructure coincides with one of the three intersection points of the three sides of the adjacent triangular pyramid prism microstructure.

Preferably, the light incidence side of the light-transmitting substrate is also provided with a plurality of triangular prism units which are sequentially arranged, and the LED lamps are positioned on the same plane of the light incidence side.

Preferably, the triangular pyramid prisms are arranged separately.

To sum up, the utility model has the advantages that:

the triangular pyramid prism microstructure is used for enabling light rays which are incident from the light incident side and have an incident angle smaller than a preset angle to be subjected to three times of total reflection on the single microstructure and return to the inside of the light-transmitting base body, and therefore the light energy utilization rate is improved.

Drawings

FIG. 1 is a schematic diagram of a background art;

FIG. 2 is a schematic diagram of a triangular prism microstructure according to the present invention;

FIG. 3 is a schematic view of the light transmission of the triangular prism microstructure of the present invention;

FIG. 4 is a schematic diagram of an arrangement of triangular prism units according to the present invention;

fig. 5 is a schematic view of the whole structure of the light guide plate with the LED lamp according to the present invention.

The marks in the figure are respectively 1 and a light-transmitting matrix; 2. a light incident side; 3. a light emitting side; 4. a triangular prism unit; 41. a triangular prism microstructure; 42. a planar area.

Detailed Description

In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention. The present invention will be described in detail with reference to the accompanying drawings.

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 to 5, a nuclear resonance diffusion imaging device, includes a printing opacity base member, the printing opacity base member including go into the light side and with the light-emitting side that goes into the relative setting of light side, it is provided with the LED lamp to go into the light side, it is parallel to each other with the light-emitting side to go into the light side, the light-emitting side surface is provided with a plurality of bellied triangular pyramid prism units, triangular pyramid prism unit includes triangular pyramid prism micro-structure and its near plane region, every triangular pyramid prism structure is a tetrahedron structure that an arbitrary angle and a scarf of cube cut, the tetrahedron structure is respectively by three congruent right angle isosceles triangle and an equilateral triangle, the one side at the equilateral triangle place of triangular pyramid prism micro-structure and the light-emitting side of printing opacity base member are located the same face.

The working principle is as follows: the triangular pyramid prism microstructure is used for enabling light rays which are incident from the light incident side and have an incident angle smaller than a preset angle to be subjected to three-time total reflection on the single microstructure and return to the inside of the light-transmitting base body, and therefore the light energy utilization rate is improved.

The plane area around each triangular pyramid prism microstructure is hexagonal, one of intersection points of three sides of each triangular pyramid prism microstructure is superposed with one of three intersection points of three sides of the adjacent triangular pyramid prism microstructure in the most compact arrangement mode, and the light transmission energy is the lowest.

The LED lamp is characterized in that the light incidence side of the light-transmitting base body is also provided with a plurality of triangular-cone prism units which are sequentially arranged, the LED lamp is positioned on the same plane of the light incidence side, and the light energy which is reversely transmitted to the light incidence side in the light guide plate can be effectively reflected into the light guide plate by the scheme, so that the light utilization rate is further improved.

The triangular pyramid prisms may also be arranged separately.

The above description is only for the preferred embodiment of the present invention, and the present invention is not limited to the above description, and although the present invention is disclosed in the preferred embodiment, it is not limited to the above description, and any person skilled in the art can make some changes or modifications to equivalent embodiments without departing from the scope of the present invention, but all the technical solutions of the present invention are within the scope of the present invention.

Claims

1. A light guide plate is characterized in that: including a printing opacity base member, the printing opacity base member including go into the light side and with the light-emitting side that goes into the relative setting of light side, it is provided with the LED lamp to go into the light side, it is parallel to each other with the light-emitting side to go into the light side, the light-emitting side surface is provided with a plurality of bellied three pyramid prism units, three pyramid prism units include three pyramid prism micro-structures and its near plane region, every the tetrahedron structure that an arbitrary angle and a scarf that triangle prism structure is a cube cut into, the tetrahedron structure is by three congruent right angle isosceles triangle and an equilateral triangle respectively, the one side at three equilateral triangle place of three pyramid prism is located the same face with the light-emitting side of printing opacity base member.

2. The light guide plate according to claim 1, wherein: the plane area around each triangular pyramid prism microstructure is hexagonal, and one of intersection points of three edges of each triangular pyramid prism microstructure is coincided with one of three intersection points of three edges of the adjacent triangular pyramid prism microstructure.

3. The light guide plate according to claim 2, wherein: the LED lamp is characterized in that a plurality of triangular-cone prism units which are sequentially arranged are also arranged on the light incidence side of the light-transmitting substrate, and the LED lamps are positioned on the same plane of the light incidence side.

4. The light guide plate according to claim 3, wherein: the triangular pyramid prisms are arranged in a separated manner.